It's not as easy as that. As Ashley posted in the link above...
[quote:1tenv7nf]Important When you activate Developer Mode on Xbox One, you are opting into Xbox system updates for a developer preview release that includes experimental and early pre-release software. This means that some popular games and apps will not work as expected, and you may experience occasional crashes and data loss. If you leave the developer preview, your console will factory reset and you will have to reinstall all of your games, apps, and content.
That's wrong. Installing and enabling the Dev Mode does not erase anything you have installed and you can go back to your regular console at any time. In fact, I just did that right now.
I did get an error but it was because I had to uninstall the games I was developing before unchecking the "developer mode" option on the system menu.